Self-flow water injection device and method for ultra-deep fracture-cavity type reservoir oil well

A self-flowing water injection and oil well technology, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of high development cost, etc., and achieve the effect of improving efficiency, saving development investment or cost, and saving construction cost

Pending Publication Date: 2022-04-12
成都汉科石油技术有限公司 +1
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Problems solved by technology

[0004] The purpose of this application is to address the problems existing in the development of oil wells in ultra-deep fracture-cavity reservoirs, and to provide a self-flowing water injection device and method for oil wells in ultra-deep fracture-cavity reservoirs, which can solve the problem of high development costs of traditional water injection methods in the past

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  • Self-flow water injection device and method for ultra-deep fracture-cavity type reservoir oil well

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Embodiment Construction

[0021] The present application is further described in conjunction with the following examples.

[0022] A specific embodiment of the self-flowing water injection device for an ultra-deep fracture-cavity reservoir oil well of the present application, as figure 1 As shown, it includes tubing 2, packer 3 and casing 1. The casing 1 is set in an oil well, which is a vertical shaft in the prior art and can be constructed by a well completion string. The completion string includes components such as the completion string body, drill pipe, packer, perforator, and temporary plugging ball seat. It can be drilled in stages and casings of different specifications can be added in stages to form a multi-level stepped oil well. . When drilling, the completion string lowers the drill pipe and packer into the casing, pressurizes the drill pipe to make the packer seat seal and the casing form a seal and fix, and there is a set between the packer and the drill pipe. Throw away the structure....

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Abstract

The invention relates to a self-flow water injection device and method for an ultra-deep fracture-cavity type reservoir oil well. The self-flow water injection device comprises an oil pipe, a packer, a water injection and oil extraction change-over valve and a sleeve; the casing pipe is arranged in an oil well, the bottom end of the oil pipe is inserted into the casing pipe, the top end of the oil pipe is communicated with external oil extraction equipment, an annulus is formed between the pipe column and the casing pipe, and the packer is arranged in the annulus and arranged on the peripheral side of the pipe column in a sleeving mode. The oil well is provided with a high-pressure water layer, the sleeve is communicated with the high-pressure water layer through a perforation, the pipe portion, right opposite to the perforation, of the oil pipe is an anti-erosion pipe portion, and the water injection and oil extraction change-over valve is arranged in the oil pipe, used for controlling connection or disconnection of the interior and the exterior of the oil pipe and located above the high-pressure water layer in the height direction. The packer is located below the high-pressure water layer in the height direction. The high-pressure water layer of the oil well can be used as a water injection source, a water source well does not need to be built, and device cost and development investment are saved.

Description

technical field [0001] The present application relates to the technical field of oil well exploitation, in particular to a self-flowing water injection device and method for ultra-deep fracture-cavity reservoir oil wells. Background technique [0002] One of the important features of ultra-deep fracture-cavity carbonate reservoirs with a depth of more than 5,000 meters is that caves that are genetically related to faults, fractures, and karstification are the main oil storage spaces, and fracture surfaces or fractures are the main flow channels. , The matrix basically does not contain oil gas or contains little oil gas. It usually has the following characteristics: First, after multiple individual reservoirs on the plane, the reservoir units are mainly distributed along the source strike-slip faults, and the extension distance of the reservoirs along the fault line is as short as several thousand meters to more than ten kilometers, and as long as Then tens of kilometers or ...

Claims

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Application Information

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IPC IPC(8): E21B43/20E21B47/06
Inventor 王志军上官丰收邓松
Owner 成都汉科石油技术有限公司
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